That’s a good question, and you can use the Internet Archive to answer it!

Plone is an open source Content Management System (CMS) that you can use to create and run a web site. Among other things, it’s got a nice, graphical interface so that people adding content to the site don’t have to know html or have any other technical skills to contribute.

If you’re interested in learning more about it, just do a search for videos about Plone on archive.org and you’ll find about 30 instructional movies to help you get started creating your own Plone web site.